Means for operating ductor rollers on printing machinery



Jan. 8, 1929. 1,69 ,301

H. GEARING MEANS FOR OPERATING 'DUCTOR ROLLERS ON PRINTING MACHINERY Filgd Sept. 20, 1926 FI9.l.

172 yen 'or: War/"y G'Gak6hy Patented Jan. 8, 1929.-

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HARRY GEARING, 013 LOS ANGELES, CALIFORNIA, ASSIGNOR T0 NEBRASKA I COMPANY, OF LINCOLN, NEBRASKA. I

MEANS FOR OPERATING D'iJ'GTOR ROLLERS ON. PRINTING BIACHINERY.

Application filed September My invention relates to improvements in mechanism for operating the ductor roller of a printing machine, although it is usable in otherplaces and is not limited in its ap plication to mechanisms such as illustrated on the accompanying sheet of drawings.

Among the salient objects of the invention is to provide a simple and practical mechanism for positively moving the ductor roller of a printing machine in such manner as to allow a more prolonged contact with the rollers with which it engages in transferring ink from one roller to the other, a new and effective mechanism being provided for accomplishing this result.

In order to illustrate my invention and to properly explain it, I have shown one practical embodiment thereof on the accompanying sheet of drawings which I will now describe.

Figure 1 is a face view of a mechanism embodying my invention;

Figure 2 is an edge view thereof;

Figure 3 is a face view showing the ductor roller moved from the position shown in Fig. 1; and

Figure 4 is an edge view with partsbroken away and shown in section.

Referring in detail to the drawings, 5, designates a roller to which ink is supplied, andt designates an inking roller to which the ink is transferred from the roller, 5, the ductor roller being designated 7, and being movable back and forth from roller 5, to roller 6, in a manner now to be described.

Said ductor roller, 7, is carried on a shaft, 8, supported at its opposite ends in rocker arms 9, mounted on a shaft, 10, said rocker arms being indicated in light broken lines in Fig. 1, behind theside frame, 11. The lower end of saidrocker arm, designated, 9', has attached theretoa coiled spring, 12,

secured at its opposite end to the frame member, 13, indicated in light broken lines, which spring operates to normally move said rocker arms so as to move the ductor roller, 7, toward the roller, 6, or in the position indicated in Fig. 1.

The mechanism for moving said rocker arm, 9, and said ductor roller, 7, are shown on the outside of the frame member, 11, and comprises an arm, 14, on the outer end of the shaft 10, having a cam roller, 15,011 its free end, as indicated. An operatincam, EB. mounted to be rocked an a bolt fl 20, 1926. Serial No. 136,497.

in the side of the frame,- 11, is provided with Y site end said cam member is provided with two spaced arms, 16, 16", which operate around a roller element, 18, on a vertical operating bar, l9, which has a vertical movement up and down and can be operated in any desired manner.

The use and operation ofthe invention may be briefly described as follows: The

ductor roller, 7, is normally and yieldingly held in contact with'roller, 6, bymeans of the spring, 12, operating on the lower end oft-he rocker arm, 99, on the shaft 10. As the vertical operating bar, 19, is raised, it operates through the roller, 18, to rock the cam member, 16, causing the curved cam surface, 16 to move the arm, 14, through engagement with the roller, 15, thus rocking the shaft, 10, and moving the arm, 9, and the ductor roller, 7 to the roller, 5, as shown in full lines in Fig. 3. This movement is positive and gradual for the reason that the curvedcam' surface 16' is long enough to hold the arm in this position until the vertical bar ismoved down again, that is,

the initial movement of the cam member, 16,

moves the ductor roller with a quick movement to the roller 5, and holds it there during the complete movement of the cam member and of the vertical bar 19, to the position shown-in Fig. 3 and back again to the position shown in Fig. 1, whereupon .the spring, 12,. operates to quickly move the duotor roller, 7, to the roller, 6, shown in Fig; 1. Thus there is a somewhat prolonged engagement of the ductor roller, 7, with the ink supplying roller, 5, instead of a. quick oscillating movement of the ductor roller back and forth between the rollers 5 and 6. The roller, 6, being driven, imparts a revolving movement to the ductor ro1ler, 7, and when it contacts with the ink supplying roller, 5, it causes a revolving engagementand thus picks up ink from a greater area of said roller, 5, by reason of the prolonged engagement therebetween, and making a more efficient ink transfer to the roller 6.

I do not limit the invention to the details shown and described, except as I maybe limited by the hereto appended claims.

I claimi l In a machine, in

with two ink rollers and a ductor roller for transferring ink from one to the other, means for oscillating said ductor roller, said means including a supporting arm therefor pivotally mounted, a spring normally holding said arm moved to one position of movement, a cam roller for moving said arm, a cam member pivotally mounted and having a curved cam surfaceand a straight surface meeting at an angle for operating said cam roller and said arm, said cam member having an arm for rockingit, a vertical bar adapted to be moved up and down intermittently, and operating connections from said bar to said cam member armfor rocking said cam member, substantially asshown and described. 7

2. Means for operating a ductor roller of having an arm connectedto said reciprocating bar, said cam member having a curved cam surface and a straight cam surface meeting at an angle, a rocker arm carrying said ductor roller, and operating connections from said rocker arm to said cam member,

whereby the reciprocating bar operates to move said ductor roller substantially in the manner indicated.

Signed at Los Angeles, Los Angeles County, California, th is27 day 01 August,

HARRY GEARIANG. 

